Buell 2002 X1, Service Manual

Page: 234 / 462

4-16 2002 Buell X1: Fuel System
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*Depends on position of idle set screw
Table 4-1. Typical Scan Values
ITEM
MIN.
VALUE
MAX.
VALUE
HOT
IDLE
RPM 500 6900 1000*
ET (temperature, °F) 3 558 varies
ET (voltage) 0.05 4.95 varies
IAT (temperature) varies varies varies
IAT (voltage) 0.05 4.95 varies
TP (degrees) 0 85 6-6.5*
TP (voltage) 0.5 4.8 0.5-1.5*
INJ PW varies varies varies
Advance (degrees) 0 45 3-30°
(varies)
Battery (voltage) 8 16 13.5
Eng run STOP RUN RUN
O2 (voltage) 0 1 0.4-0.6
Table 4-2. Engine Starts Hard
SYMPTOM SOLUTION
Engine temperature circuit 4.19 TROUBLE CODE 14.
Improper fuel pressure 4.14 FUEL PRESSURE
TEST.
Spark plugs and/or wires 4.16 MISFIRE.
Battery discharged See charging system trouble-
shooting in Section 7.
CMP sensor 4.28 TROUBLE CODE 56.
Manifold leak Spray water around induc-
tion module seals with engine
idling. If RPM changes,
change seals.
Ignition coil 4.16 MISFIRE.
Leaky injectors Test fuel injectors. See 4.41
THROTTLE BODY AND
INTAKE MANIFOLD
.
Valve sticking See Section 3
Table 4-3. Engine Performance Problems
SYMPTOM SOLUTION
Engine temperature circuit 4.19 TROUBLE CODE 14.
CMP circuit 4.28 TROUBLE CODE 56.
Spark plugs and/or wires 4.16 MISFIRE.
Improper fuel pressure 4.14 FUEL PRESSURE
TEST.
Improper TP sensor
adjustment Calibrate sensor. See 4.36
THROTTLE POSITION
SENSOR
.
Manifold leak Spray water around induc-
tion module seals with
engine idling. If RPM
changes, change seals.
Throttle plates not opening
fully See Section 1.
EVAP hose disconnected
from induction module (CA) Connect.
Water or dirt in fuel system Drain and refill with fresh
fuel.
Table 4-4. Engine Exhaust Emits
Black Smoke or Fouls Plugs
SYMPTOM SOLUTION
Engine temperature circuit 4.19 TROUBLE CODE 14.
Clogged air filter See Section 1.
Improper TP sensor
adjustment Calibrate sensor. See 4.36
THROTTLE POSITION
SENSOR
.
Leaky injectors Test fuel injectors. See 4.41
THROTTLE BODY AND
INTAKE MANIFOLD
.
Improper fuel pressure 4.14 FUEL PRESSURE
TEST.